#region License

// Dimebrain TweetSharp
// (www.dimebrain.com)
// 
// The MIT License
// 
// Copyright (c) 2009 Dimebrain
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// 

#endregion

using System;
using Dimebrain.TweetSharp.Core.Caching;
using Dimebrain.TweetSharp.Core.Extensions;

namespace Dimebrain.TweetSharp.Core.Web.Query
{
    partial class WebQueryBase
    {
        private static string CreateCacheKey(string prefix, string url)
        {
            return !prefix.IsNullOrBlank() ? "{0}_{1}".FormatWith(prefix, url) : url;
        }

        protected virtual string ExecuteWithCache(IClientCache cache,
                                                  string url,
                                                  string key,
                                                  Func<IClientCache, string, string> cacheScheme)
        {
            var fetch = cache.Get<string>(CreateCacheKey(key, url));
            if (fetch != null)
            {
                return fetch;
            }

            var result = cacheScheme.Invoke(cache, url);
            return result;
        }

        protected virtual string ExecuteWithCacheAndAbsoluteExpiration(IClientCache cache,
                                                                       string url,
                                                                       string key,
                                                                       DateTime expiry,
                                                                       Func<IClientCache, string, DateTime, string> cacheScheme)
        {
            var fetch = cache.Get<string>(CreateCacheKey(key, url));
            if (fetch != null)
            {
                return fetch;
            }

            var result = cacheScheme.Invoke(cache, url, expiry);
            return result;
        }

        protected virtual string ExecuteWithCacheAndSlidingExpiration(IClientCache cache,
                                                                      string url,
                                                                      string key,
                                                                      TimeSpan expiry,
                                                                      Func<IClientCache, string, TimeSpan, string> cacheScheme)
        {
            var fetch = cache.Get<string>(CreateCacheKey(key, url));
            if (fetch != null)
            {
                return fetch;
            }

            var result = cacheScheme.Invoke(cache, url, expiry);
            return result;
        }
    }
}